Answer: Option A
Answer: (a)
Operating system, editors, and debuggers comes under System Software.
System software is computer software designed to provide a platform for other software. Examples of system software include operating systems like macOS and Windows, computational science software, game engines, industrial automation, and software as a service application.
A debugger or debugging tool is a computer program that is used to test and debug other programs (the "target" program). ... For example, the program might have tried to use an instruction not available on the current version of the CPU or attempted to access unavailable or protected memory